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  • 1
    Electronic Resource
    Electronic Resource
    Characterisation of the radish introgression carrying the Rfo restorer gene for the Ogu-INRA cytoplasmic male sterility in rapeseed (Brassica napus L.) (1998)
    Springer
    Theoretical and applied genetics 97 (1998), S. 129-134 
    Details
    ISSN: 1432-2242
    Keywords: Key words Brassica napus ; Raphanus sativus ; Restorer gene ; Introgression ; RFLP ; RAPD ; Genetic mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Bulked segregant analysis and comparative mapping were applied to identify molecular markers linked to the Rfo restorer gene used for the Ogu-INRA cytoplasmic male-sterility system in rapeseed. These markers were then used to localise the radish introgression on the B. napus genetic map constructed from the cross ‘Darmor.bzh’ x ’Yudal’. The introgression mapped on the DY15 linkage group. From the comparison of this latter group to the linkage group constructed on a F2 progeny segregating for the radish introgression, it was concluded that the introgression had occurred through homoeologous recombination, that it was not distal and that it had replaced a B. napus region of around 50 cM. A QTL involved in aliphatic seed glucosinolate content was located on the DY15 linkage group at a position corresponding to one end of the introgression. The DNA markers identified in this study are being used in map-based cloning of the Rfo gene and in marker-assisted selection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050876
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  • 2
    Electronic Resource
    Electronic Resource
    Comparison of the genetic maps of Brassica napus and Brassica oleracea (1997)
    Springer
    Theoretical and applied genetics 94 (1997), S. 569-582 
    Details
    ISSN: 1432-2242
    Keywords: Key words Brassica napus ; Brassica oleracea ; Genetic maps ; RFLP ; RAPD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The genus Brassica consists of several hundreds of diploid and amphidiploid species. Most of the diploid species have eight, nine or ten pairs of chromosomes, known respectively as the B, C, and A genomes. Genetic maps were constructed for both B. napus and B. oleracea using mostly RFLP and RAPD markers. For the B. napus linkage map, 274 RFLPs, 66 RAPDs, and two STS loci were arranged in 19 major linkage groups and ten smaller unassigned segments, covering a genetic distance of 2125 cM. A genetic map of B. oleracea was constructed using the same set of RFLP probes and RAPD primers. The B. oleracea map consisted of 270 RFLPs, 31 RAPDs, one STS, three SCARs, one phenotypic and four isozyme marker loci, arranged into nine major linkage groups and four smaller unassigned segments, covering a genetic distance of 1606 cM. Comparison of the B. napus and B. oleracea linkage maps showed that eight out of nine B. oleracea linkage groups were conserved in the B. napus map. There were also regions in the B. oleracea map showing homoeologies with more than one linkage group in the B. napus map. These results provided molecular evidence for B. oleracea, or a closely related 2n=18 Brassica species, as the C-genome progenitor, and also reflected on the homoeology between the A and C genomes in B. napus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050453
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